Fire protection unit and fire protection structure

Abstract

The present invention provides a fire prevention unit that can quickly and reliably seal the gap between a through-hole and a long body in the event of a fire. [Solution] The fire protection unit (1) comprises a sleeve member (10) inserted through a through hole (8H) of a partition (8), a first fire-resistant member (20) fixed to the inner circumferential surface of the sleeve member (10), and a second fire-resistant member (30) fixed to the inner circumferential side of the sleeve member (10) and arranged to extend radially.

Description

Technical Field

[0001] The present invention relates to a fire protection unit and a fire protection structure.

Background Art

[0002] In general, the internal space of a building is partitioned into a plurality of room spaces by partitioning bodies such as walls, floors, and ceilings. When a fire breaks out in a certain room space, a fire-resistant partitioning body may be used to prevent the fire from spreading to other room spaces. In this case, when a long body such as a pipe or a cable is inserted into a through-hole formed in the partitioning body, there is a possibility that flame may pass through the gap between the through-hole and the long body and cause fire spread, so the gap needs to be configured as a fire protection structure.

[0003] An example of such a fire protection structure is disclosed in Japanese Patent Laid-Open No. 2021-019948 (Patent Document 1). The partition penetration processing structure 10 of Patent Document 1 includes an insertion member 18 that is inserted into through-holes 13A and 13B formed in a partition portion 11 of a building. The insertion member 18 of Patent Document 1 is made of a fire-resistant material, and is configured to prevent fire spread by being heated and expanding in the event of a fire.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the partition penetration processing structure 10 of Patent Document 1, the insertion member 18 is formed in a sleeve shape and is placed on the inner surface of the through holes 13A and 13B, and the insertion member 18 and the insertion body 21, which is also inserted into the inside of the through holes 13A and 13B, are spaced apart radially. With such a structure, there was a concern that if a fire actually occurred, heat would not easily be transferred to the insertion member 18, and the gap between the through holes 13A and 13B and the insertion body 21 could not be stably closed, or that it would take a long time to close.

[0006] There is a need for a fire protection unit and fire protection structure that can quickly and reliably close the gap between the through-hole and the long body in the event of a fire. [Means for solving the problem]

[0007] The fire prevention unit according to the present invention is A fire protection unit for creating a fire-resistant structure in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, A sleeve member inserted through the aforementioned through hole, A first fire-resistant member, which includes a heat-expandable fire-resistant material, is fixed to the inner circumferential surface of the sleeve member. A second fire-resistant member, which includes a thermally expandable fire-resistant material, is fixed to the inner circumference of the sleeve member and is arranged to extend radially in the sleeve member. It is equipped with.

[0008] Furthermore, the fire prevention structure according to the present invention is A fire protection structure provided in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, A sleeve member inserted through the aforementioned through hole, A first fire-resistant member containing a heat-expandable fire-resistant material is arranged on the inner circumferential surface of the sleeve member, A second fire-resistant member containing a thermally expandable fire-resistant material is arranged on the inner circumference side of the sleeve member so as to extend in the radial direction of the sleeve member, It is equipped with.

[0009] With these configurations, in addition to the first fire-resistant member positioned on the inner circumferential surface of the sleeve member, a second fire-resistant member is provided that extends radially from the sleeve member. Therefore, in the event of an actual fire, heat is easily transferred to the second fire-resistant member, which is located closer to the elongated body. As a result, the second fire-resistant member is more likely to expand thermally first, allowing it to begin closing the gap between the through-hole and the elongated body earlier. Subsequently, by thermally expanding the first fire-resistant member positioned on the inner circumferential surface of the sleeve member, the gap between the through-hole and the elongated body can be stably closed. Thus, in the event of a fire, the gap between the through-hole and the elongated body can be closed early and stably.

[0010] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited by the preferred embodiments described below.

[0011] As one aspect, It is preferable to further provide a shielding member that is positioned outside the longitudinal direction of the elongated body more than the second fire-resistant member and that blocks the gap between the second fire-resistant member and the elongated body.

[0012] With this configuration, even if a minute gap occurs between the second fire-resistant member and the elongated body, it is possible to suppress the movement of smoke through the minute gap between the second fire-resistant member and the elongated body until the second fire-resistant member undergoes thermal expansion, for example, in the event of a fire.

[0013] As one aspect, It is preferable that the shielding member is fixed to the inner circumferential surface of the sleeve member.

[0014] With this configuration, the sleeve member, the first fire-resistant member, the second fire-resistant member, and the shielding member can be treated as a single unit. Therefore, handling becomes easier and workability can be improved.

[0015] As one aspect, The sleeve member further comprises a retaining member arranged on the outer circumference and fixed to the outer surface of the partition body, Preferably, the shielding member is fixed to the inner peripheral surface of the holding member.

[0016] According to this configuration, the sleeve member, the first fire-resistant member, and the second fire-resistant member can be handled as one unit (first unit) as a whole. Separately therefrom, the holding member and the shielding member can also be handled as one unit (second unit) as a whole. This facilitates handling, improves the workability of the first unit which is the minimum required, and also improves the workability of the second unit when necessary depending on whether the shielding member is required or not.

[0017] In one aspect, Preferably, the thermal expansion initiation temperature of the first fire-resistant member is lower than the thermal expansion initiation temperature of the second fire-resistant member.

[0018] According to this configuration, the first fire-resistant member, which is located farther from the long body than the second fire-resistant member and to which heat is less likely to be transmitted, can start thermal expansion relatively early. This makes it possible to shorten the total time required to stably close the gap between the through hole and the long body when a fire occurs.

[0019] In one aspect, Preferably, the thermal expansion initiation temperature of the second fire-resistant member is lower than the thermal expansion initiation temperature of the first fire-resistant member.

[0020] According to this configuration, the second fire-resistant member, which should be thermally expanded prior to the first fire-resistant member, can start thermal expansion at the earliest opportunity. This allows the gap between the through hole and the long body to be closed quickly at the initial stage when a fire occurs.

[0021] In one aspect, Preferably, the thermal expansion initiation temperature of the first fire-resistant member and the thermal expansion initiation temperature of the second fire-resistant member are equal.

[0022] This configuration allows for the use of the same thermally expandable fire-resistant material in both the first and second fire-resistant components, resulting in lower costs compared to preparing optimal materials for each component individually.

[0023] As one aspect, Preferably, the sleeve member is further provided with a locking member that is arranged on the outer circumferential surface and engages with the outer surface of the partition.

[0024] This configuration allows for the positioning of the sleeve member relative to the compartment by utilizing the fact that the locking member engages with the outer surface of the compartment. Furthermore, even if a minute gap occurs between the through-hole and the sleeve member, it is possible to prevent smoke from moving through that minute gap, for example, in the event of a fire.

[0025] As one aspect, It is preferable that the sleeve member is formed in a cylindrical shape by rolling up a non-combustible sheet material and overlapping its ends.

[0026] With this configuration, because the sleeve member is non-combustible, even if the compartment is formed hollow, for example, the first fire-resistant member can be supported from the outer periphery, and the gap between the through-hole and the elongated body can be properly closed. In addition, by adjusting the overlap between the ends of the rolled sheet material, the diameter of the sleeve member can be adjusted according to the inner diameter of the through-hole in the compartment.

[0027] As one aspect, Preferably, the second fire-resistant member has a sheet-like support portion arranged along the inner circumferential surface of the sleeve member and a plurality of sheet-like protrusions extending radially from the support portion.

[0028] This configuration allows for the radial support of the elongated body by multiple protruding pieces formed with a predetermined width, stabilizing the installation position of the elongated body, while also enabling the early sealing of the gap between the through-hole and the elongated body in the event of a fire.

[0029] As one aspect, Preferably, the second fire-resistant member has a plurality of tongue-shaped pieces arranged such that their base portions are connected to each other along the inner circumferential surface of the sleeve member, while their apex portions face each other radially.

[0030] This configuration allows for the radial support of the elongated body with multiple tongue-shaped pieces, stabilizing its installation position in a space-saving manner, while also enabling the early sealing of the gap between the through-hole and the elongated body in the event of a fire.

[0031] Further features and advantages of the present invention will become clearer through the following description of exemplary and non-limiting embodiments, with reference to the drawings. [Brief explanation of the drawing]

[0032] [Figure 1] Schematic diagram of the fire protection structure of the first embodiment [Figure 2] Perspective view of the fire protection unit of the first embodiment [Figure 3] Exploded perspective view of the fire protection unit of the first embodiment. [Figure 4] A view from the axial direction showing how the second fire-resistant member supports the elongated body. [Figure 5] A schematic diagram showing the changes in the state of a fire prevention unit during a fire. [Figure 6] Schematic diagram of the fire protection structure of the second embodiment [Figure 7] Perspective view of the fire protection unit of the second embodiment [Figure 8] Exploded perspective view of the fire protection unit of the second embodiment. [Figure 9] Schematic diagram of the fire protection structure of the third embodiment [Figure 10] Perspective view of the fire protection unit of the third embodiment [Figure 11] Exploded perspective view of the fire protection unit of the third embodiment. [Figure 12] Schematic diagram of the fire protection structure of the fourth embodiment [Figure 13]Perspective view of the fire protection unit according to the fourth embodiment. [Figure 14] Exploded perspective view of the fire protection unit of the fourth embodiment. [Modes for carrying out the invention]

[0033] [First Embodiment] A first embodiment of the fire protection unit and fire protection structure will be described with reference to the drawings. As shown in Figure 1, the fire protection structure of this embodiment is provided in the gap G between a through hole 8H formed in a building compartment 8 and a long body 9 inserted through the through hole 8H. This fire protection structure is realized using a fire protection unit 1.

[0034] In this embodiment, the longitudinal direction of the elongated body 9 is referred to as the "axial direction," the direction perpendicular to the longitudinal direction of the elongated body 9 is referred to as the "radial direction," and the direction that circles around the elongated body 9 is referred to as the "circumferential direction." In the following description, the orientation of each component constituting the fire protection unit 1 may be described in terms of the state in which the fire protection unit 1 is fixed to the compartment 8.

[0035] The compartment 8 to which the fire-resistant structure is applied is a fire-resistant structure that divides the space within a building into multiple room spaces. The compartment 8 may be, for example, a wall that divides multiple room spaces horizontally (see Figure 1), or a floor (or ceiling) that divides multiple room spaces vertically. Examples of the compartment 8 include reinforced concrete (RC), autoclaved lightweight concrete (ALC), and hollow walls (including gypsum board, etc.). Of course, structures other than those listed above may also be used as the compartment 8.

[0036] As shown in Figure 1, the partition 8 has a through-hole 8H that penetrates the partition 8 in its thickness direction (horizontal direction in the illustrated example). In this embodiment, a circular through-hole 8H is formed. However, the specific shape of the through-hole 8H is not limited to this configuration, and may be various shapes such as elliptical, oblong, and polygonal.

[0037] A long body 9 is inserted through the through-hole 8H of the compartment 8. The long body 9 has a long structure extending in one direction, such as a linear body, a tubular body, or a strip-shaped body. An example of such a long body 9 is refrigerant piping for an air conditioning system. In this case, the long body 9 may include a metal piping member for refrigerant circulation and a synthetic resin covering material (insulating material) that covers the periphery of the piping member. Note that the long body 9 is not limited to refrigerant piping for an air conditioning system, but may also be, for example, water supply and drainage piping or electrical cables.

[0038] Furthermore, the long body 9 may be inserted into the through hole 8H individually as a single unit, or multiple units may be inserted into the through hole 8H as a bundle.

[0039] As shown in Figures 2 and 3, the fire protection unit 1 comprises a sleeve member 10, a first fire-resistant member 20, and a second fire-resistant member 30. Furthermore, the fire protection unit 1 of this embodiment further comprises a locking member 40 and a shielding member 50. In this embodiment, the sleeve member 10, the first fire-resistant member 20, the second fire-resistant member 30, the locking member 40, and the shielding member 50 are fixed to each other and integrated.

[0040] The sleeve member 10 in this embodiment is a non-combustible sleeve 12 formed by rolling up a non-combustible sheet material. In this embodiment, the sleeve member 10 (non-combustible sleeve 12) is formed by rolling up a thin metal sheet. As the metal material constituting the sleeve member 10, for example, stainless steel, aluminum, copper, and various alloys can be used. When no external force is acting on the sleeve member 10 (no-load state), the circumferential ends of the sleeve member 10 are spaced apart from each other, and it is formed in a roughly C-shape when viewed from the axial direction. The outer diameter of the sleeve member 10 in the no-load state is about the same as or slightly larger than the inner diameter of the through hole 8H. Also, the axial length of the sleeve member 10 is set to be longer than the thickness of the partition 8.

[0041] Because the sleeve member 10 is C-shaped in an unloaded state, the sleeve member 10 can be attached to the elongated body 9 from the outside while the elongated body 9 is inserted through the through hole 8H. The sleeve member 10 can also be made cylindrical with an outer diameter less than or equal to the inner diameter of the through hole 8H by an operator applying force to overlap its ends. By making the sleeve member 10 cylindrical with an outer diameter less than or equal to the inner diameter of the through hole 8H, the sleeve member 10 can be inserted into the through hole 8H along the axial direction. When the operator releases the force in that state, the elastic restoring force of the sleeve member 10 causes the sleeve member 10 to expand in diameter until it conforms to the inner surface of the through hole 8H, and the sleeve member 10 is installed in the through hole 8H with the sleeve member 10 inserted through it.

[0042] The first fire-resistant member 20 is a member containing a thermally expandable fire-resistant material. The thermally expandable fire-resistant material is a member that has thermal expandability (the property of increasing in volume when heated) and fire resistance (the property of being able to withstand heat and having a high melting point and being difficult to burn). As the thermally expandable fire-resistant material, any known material can be used without particular limitation, for example, a putty-like member (thermally expandable putty-like fire-resistant material) can be used. Furthermore, in this embodiment, the thermally expandable fire-resistant material has flexibility (the property of being able to bend) in addition to thermal expandability and fire resistance. As such a thermally expandable fire-resistant material, for example, one that includes a resin component having flexibility and fire resistance and a thermally expandable filler kneaded into this resin component can be used. Furthermore, the thermally expandable fire-resistant material may also have adhesiveness (the property of being sticky and easily adhering to other substances).

[0043] The first fire-resistant member 20 is formed in a sheet shape. The first fire-resistant member 20 in this embodiment is composed of a rectangular sheet-shaped molded body 22 having a predetermined width and predetermined length. Furthermore, this sheet-shaped molded body 22 is formed in a thick sheet shape having a predetermined thickness. The thickness of the sheet-shaped molded body 22 is set to, for example, about 1 mm to 8 mm. For example, if the heat-expandable fire-resistant material is adhesive, the sheet-shaped molded body 22 may be covered with a film. As the film, for example, resin films such as polyethylene, polypropylene, polyvinyl chloride, and polyethylene terephthalate can be used.

[0044] The first fire-resistant member 20 is fixed to the inner circumferential surface of the sleeve member 10. The sheet-like first fire-resistant member 20 is fixed so as to fit snugly along the inner circumferential surface of the sleeve member 10. The first fire-resistant member 20 is positioned radially apart from the elongated body 9 when the sleeve member 10 is installed in the through hole 8H.

[0045] The heat-expandable fire-resistant material contained in the first fire-resistant member 20 expands when heated, for example, by the heat of a flame during a fire. The thermal expansion coefficient of the heat-expandable fire-resistant material is not particularly limited, but may be, for example, 10 to 40 times. The thermal expansion initiation temperature of the first fire-resistant member 20 is not particularly limited, but may be, for example, 150°C to 250°C. It is preferable that the thermal expansion initiation temperature of the first fire-resistant member 20 is lower than that of the second fire-resistant member 30. In this way, even if heat is not easily transferred due to the distance from the elongated body 9, the first fire-resistant member 20 can begin to expand relatively early.

[0046] The second fire-resistant member 30 is a member formed into a predetermined shape and containing a thermally expandable fire-resistant material. The thermally expandable fire-resistant material constituting the second fire-resistant member 30 can be the same as the thermally expandable fire-resistant material constituting the first fire-resistant member 20, except for specific materials and composition. The second fire-resistant member 30 is fixed to the inner circumference side (in this example, the inner surface) of the sleeve member 10. The second fire-resistant member 30 is fixed to at least one inner surface in the axial direction of the sleeve member 10. In this embodiment, the second fire-resistant member 30 is fixed only to the inner surface on one side in the axial direction of the sleeve member 10 (the left side in Figure 2). While the sheet-like first fire-resistant member 20 conforms tightly to the inner surface of the sleeve member 10, the three-dimensionally formed second fire-resistant member 30 is arranged to extend radially across the sleeve member 10.

[0047] As shown in Figures 3 and 4, the second fire-resistant member 30 of this embodiment has a sheet-like support portion 32 that extends in the circumferential direction while having a constant axial width, and a plurality of sheet-like protruding pieces 34 that extend in the radial direction while having a constant axial width. The support portion 32 is formed in a substantially C shape when viewed from the axial direction. The outer diameter of the support portion 32 is substantially equal to the inner diameter of the sleeve member 10. The support portion 32 is fixed along the inner circumferential surface of the sleeve member 10. The plurality of protruding pieces 34 are arranged in a dispersed manner in the circumferential direction, and each extends radially from the support portion 32.

[0048] In this embodiment, the term "extending radially" is not limited to extending parallel to the radial direction, but also includes the concept of extending so that it becomes radially inward as it moves from the support portion 32 towards the tip. As can be clearly seen from Figure 4, each of the protruding pieces 34 is formed as a sheet that is curved in an arc or a sheet that is gently bent in a V-shape. The second fire-resistant member 30 also plays a role in stably supporting the elongated body 9 in a steady state by having the side surfaces of the tip ends of the multiple protruding pieces 34 abut against the elongated body 9 at multiple points in the circumferential direction.

[0049] The heat-expandable fire-resistant material contained in the second fire-resistant member 30 expands when heated, for example, by the heat of flames during a fire. The thermal expansion coefficient of the heat-expandable fire-resistant material is not particularly limited, but may be, for example, 2 to 40 times. The thermal expansion initiation temperature of the second fire-resistant member 30 is not particularly limited, but may be, for example, 150°C to 250°C. The thermal expansion initiation temperature of the second fire-resistant member 30 may be higher than that of the first fire-resistant member 20. This is because the second fire-resistant member 30 is in contact with the elongated body 9, allowing heat to be easily transferred from the elongated body 9, and thus it can heat up more quickly than the first fire-resistant member 20. The second fire-resistant member 30 plays a role in quickly thermally expanding during a fire and quickly closing the gap G between the through-hole 8H and the elongated body 9.

[0050] The locking member 40 is positioned on the outer circumferential surface of the sleeve member 10. In this embodiment, the locking member 40 is fixed to the region of the outer circumferential surface of the sleeve member 10 in the axial direction where the second fire-resistant member 30 is provided. The locking member 40 locks onto the outer surface of the compartment 8 (the outer surface in the axial direction) to position the sleeve member 10 in the axial direction.

[0051] The shape of the locking member 40 is not particularly limited and may be, for example, tape-shaped, block-shaped, columnar, or dot-shaped. The material of the locking member 40 is also not particularly limited and may be, for example, foam, putty, caulking material, or fire-resistant material, or a composite material containing two or more of these. In this embodiment, a tape-shaped foam is used as the locking member 40. Examples of foams that can be used include expanded polyethylene, expanded polypropylene, expanded polystyrene, and expanded polyurethane.

[0052] The locking member 40 also plays a role in preventing the space on the opposite side of the compartment 8 from being seen through a small gap that occurs between the compartment 8 and the sleeve member 10, and in preventing smoke from moving through the small gap in the event of a fire.

[0053] The shielding member 50 is positioned outside the second fire-resistant member 30. The shielding member 50 is positioned outside the second fire-resistant member 30 in the axial direction (in other words, on the opposite side from the first fire-resistant member 20). The shielding member 50 is positioned at one end of the sleeve member 10 in the axial direction. In this embodiment, the shielding member 50 is fixed to the inner circumferential surface of the sleeve member 10.

[0054] The shape of the shielding member 50 is not particularly limited and may be, for example, a sheet or a block. The material of the shielding member 50 is also not particularly limited and may be, for example, a foam, metal foil, or resin film, or a composite material containing two or more of these. In this embodiment, a circular foam 52 with a constant thickness and cutouts 54 is used as the shielding member 50. Examples of foams that can be used include expanded polyethylene, expanded polypropylene, expanded polystyrene, and expanded polyurethane.

[0055] The shielding member 50 is provided to block the gap between the second fire-resistant member 30 and the elongated body 9. In this embodiment, where the multiple protruding pieces 34 constituting the second fire-resistant member 30 are dispersed in the circumferential direction and extend radially, a relatively large gap is created between the second fire-resistant member 30 and the elongated body 9 (see Figure 4). The shielding member 50 serves to prevent the space on the opposite side of the compartment 8 from being seen through the gap, and to suppress the movement of smoke through the gap in the event of a fire.

[0056] In addition, a second shielding member 50 (hereinafter referred to as "shielding member 50A" for distinction purposes) may be provided, which is inserted into the sleeve member 10 from the opposite side in the axial direction, separate from the shielding member 50 fixed to the sleeve member 10.

[0057] The fire protection structure of this embodiment can be constructed using the fire protection unit 1 described above. With the elongated body 9 already inserted through the through-hole 8H of the partition body 8, the fire protection unit 1 is attached to the portion of the elongated body 9 that is outside the partition body 8 (preferably, the portion that is near the partition body 8), surrounding it from the outer periphery. Then, with the sleeve member 10 reduced in diameter so that it is smaller than the through-hole 8H, the fire protection unit 1 is axially slid and pushed into the through-hole 8H, using the locking member 40 as a guide until it locks onto the outer surface of the partition body 8. Then, by simply releasing the hand that was holding it, the fire protection structure can be easily realized. After that, if necessary, a shielding member 50A may be further placed at the end of the sleeve member 10 on the insertion tip side.

[0058] According to the fire protection structure of this embodiment, in addition to the first fire-resistant member 20 arranged on the inner circumferential surface of the sleeve member 10, a second fire-resistant member 30 is provided that extends radially from the sleeve member 10. Therefore, when a fire actually occurs, the heat is easily transferred to the second fire-resistant member 30, which is located close to the elongated body 9 (more specifically, in contact with the elongated body 9). In particular, if the elongated body 9 contains metal such as a piping member, the elongated body 9 plays a role in transferring heat, making it easier for heat to be transferred to the second fire-resistant member 30. As a result, the second fire-resistant member 30 is more likely to undergo thermal expansion first, and the gap G between the through-hole 8H and the elongated body 9 can begin to close early (see the upper part of Figure 5). Subsequently, by thermally expanding the first fire-resistant member 20 arranged on the inner circumferential surface of the sleeve member 10, the gap G between the through-hole 8H and the elongated body 9 can be stably closed (see the lower part of Figure 5). If the elongated body 9 contains a combustible material such as a covering (typically a resin material), it will burn and disappear in the event of a fire. However, even in such cases, the gap G between the through-hole 8H and the elongated body 9 can be stably closed. Therefore, in the event of a fire, the gap G between the through-hole 8H and the elongated body 9 can be closed early and stably.

[0059] [Second Embodiment] A second embodiment of the fire protection unit and fire protection structure will be described with reference to the drawings. In this embodiment, the specific configuration of the second fire-resistant member 30 differs from that of the first embodiment. Below, the differences between the fire protection unit 1 and fire protection structure of this embodiment and the first embodiment will be mainly described. Unless otherwise specified, the same reference numerals are used as in the first embodiment, and detailed explanations will be omitted.

[0060] As shown in Figures 6 to 8, the second fire-resistant member 30 of this embodiment is formed in the shape of a thin disc. The second fire-resistant member 30 has a linear connecting portion 36 extending in the circumferential direction and a plurality of sheet-like tongue-shaped pieces 38 extending in the radial direction. The connecting portion 36 is formed in a substantially C-shape or substantially circular shape when viewed from the axial direction. The outer diameter of the connecting portion 36 is substantially equal to the inner diameter of the sleeve member 10. The connecting portion 36 is fixed along the inner circumferential surface of the sleeve member 10. The plurality of tongue-shaped pieces 38 are each formed in the shape of an isosceles triangle. The plurality of tongue-shaped pieces 38 are arranged so that their respective base portions are connected to each other by the connecting portion 36, and their respective vertices face each other in the radial direction.

[0061] Similarly, the fire protection unit 1 of this embodiment can also quickly and stably close the gap G between the through-hole 8H and the elongated body 9 in the event of a fire.

[0062] [Third Embodiment] A third embodiment of the fire protection unit and fire protection structure will be described with reference to the drawings. In this embodiment, the structure for installing the shielding member 50 differs from that of the first and second embodiments. Below, the differences between the fire protection unit 1 and fire protection structure of this embodiment and the second embodiment will be described. Unless otherwise specified, the same reference numerals are used as in the second embodiment, and detailed explanations will be omitted.

[0063] As shown in Figures 9 to 11, the fire protection unit 1 of this embodiment further comprises a sleeve member 10, a first fire-resistant member 20, a second fire-resistant member 30, a locking member 40, a shielding member 50, and a holding member 60. In this embodiment, the sleeve member 10, the first fire-resistant member 20, the second fire-resistant member 30, and the locking member 40 are fixed to each other and integrated. Separately, the holding member 60 and the shielding member 50 are fixed to each other and integrated. That is, the fire protection unit 1 of this embodiment comprises a first unit in which the sleeve member 10, the first fire-resistant member 20, the second fire-resistant member 30, and the locking member 40 are integrated, and a second unit in which the holding member 60 and the shielding member 50 are integrated.

[0064] The retaining member 60 is formed by rolling up a non-combustible sheet material. In this embodiment, the retaining member 60 is formed by rolling up a thin metal plate. As the metal material constituting the retaining member 60, for example, stainless steel, aluminum, copper, and various alloys can be used. When no external force is acting on the retaining member 60 (no-load state), the circumferential ends of the retaining member 60 are spaced apart from each other, and it is formed in a roughly C-shape when viewed from the axial direction. The inner diameter of the retaining member 60 in the no-load state is about the same as or slightly larger than the outer diameter of the sleeve member 10. In addition, the axial length of the retaining member 60 is set to be longer than the shielding member 50 and shorter than the sleeve member 10.

[0065] The retaining member 60 includes a retaining frame 62 for holding the shielding member 50 and a fixing piece 64 bent from the retaining frame 62. The shielding member 50 is fixed to the inner circumferential surface of the retaining frame 62. In this embodiment, the shielding member 50 is fixed to one end of the retaining frame 62 in the axial direction. The fixing piece 64 is provided at the other end of the retaining frame 62 in the axial direction (i.e., the end opposite to the side on which the shielding member 50 is provided). The fixing piece 64 has an insertion hole 64a for passing a fixing member such as a screw through it.

[0066] The retaining member 60 is installed with the side on which the fixing piece 64 is provided facing the compartment 8. The retaining member 60 is also installed so as to partially overlap the sleeve member 10 in the axial direction. In this case, the retaining member 60 is installed such that the retaining frame 62 covers the sleeve member 10 from the outer circumference (radially outward), and the shielding member 50 covers the second fire-resistant member 30 from the axial direction. In this state, the retaining member 60 is fixed to the outer surface of the compartment 8 using fixing members such as screws.

[0067] Similarly, the fire protection unit 1 of this embodiment can also quickly and stably close the gap G between the through-hole 8H and the elongated body 9 in the event of a fire.

[0068] Furthermore, the fire protection unit 1 of this embodiment comprises a first unit in which a sleeve member 10, a first fire-resistant member 20, a second fire-resistant member 30, and a locking member 40 are integrated, and a second unit in which a holding member 60 and a shielding member 50 are integrated. This has the advantage that the workability of the first unit, which is the minimum necessary for fire protection measures, can be reliably improved, and the workability of the second unit can also be improved as needed, depending on whether the shielding member 50 is required.

[0069] [Fourth Embodiment] A fourth embodiment of the fire protection unit and fire protection structure will be described with reference to the drawings. In this embodiment, the material and structure of the sleeve member 10 differ from those of the first to third embodiments, and consequently, the structure of the first fire-resistant member 20 and the presence or absence of the locking member 40 also differ. Below, the differences between the fire protection unit 1 and fire protection structure of this embodiment and the second embodiment will be mainly described. Unless otherwise specified, the same reference numerals are used and detailed explanations are omitted for parts that are the same as in the second embodiment.

[0070] As shown in Figures 12 to 14, the sleeve member 10 of this embodiment is a resin sleeve 18 formed from a resin molded product. The type of resin that constitutes the sleeve member 10 (resin sleeve 18) is not particularly limited, and general-purpose resins such as polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC) can be used.

[0071] The sleeve member 10 (resin sleeve 18) is generally cylindrical in shape and has a sleeve body 18A that is roughly C-shaped when viewed from the axial direction, and a flange portion 18B that protrudes radially outward from the outer circumferential surface of the sleeve body 18A. The resin sleeve 18 of this embodiment has an overall shape that is like a combination of the non-combustible sleeve 12 and the locking member 40 of the second embodiment. The first fire-resistant member 20 is fixed to the inner circumferential surface of the sleeve body 18A. The flange portion 18B also locks onto the outer surface of the compartment 8 to position the fire protection unit 1 in the axial direction.

[0072] The first fire-resistant member 20 further includes a non-combustible sheet 24 in addition to the sheet-like molded body 22. The first fire-resistant member 20 in this embodiment is composed of a laminate of the sheet-like molded body 22 and the non-combustible sheet 24. The first fire-resistant member 20 is fixed to the inner circumferential surface of the sleeve member 10 (specifically, the sleeve body 18A of the resin sleeve 18) such that the non-combustible sheet 24 faces the sleeve member 10 side.

[0073] Similarly, the fire protection unit 1 of this embodiment can also quickly and stably close the gap G between the through-hole 8H and the elongated body 9 in the event of a fire.

[0074] [Other Embodiments] (1) In each of the above embodiments, a configuration in which the first fire-resistant member 20 is formed in a sheet shape was described as an example. However, the first fire-resistant member 20 is not limited to such a configuration, and may be formed in a three-dimensional shape, for example.

[0075] (2) In each of the above embodiments, the specific shape of the second fire-resistant member 30 has been described with examples. However, the second fire-resistant member 30 is not limited to such configurations, and its specific shape can be arbitrary as long as it is fixed to at least the inner circumferential surface of the sleeve member 10 and extends in the radial direction of the sleeve member 10. For example, a plurality of sheet-like protruding pieces 34 extending in the radial direction may be formed in multiple different shapes.

[0076] (3) In the above embodiments, a configuration in which the first fire-resistant member 20 and the second fire-resistant member 30 are abutted against each other in the axial direction has been described as an example. However, the configuration is not limited to this, and the first fire-resistant member 20 and the second fire-resistant member 30 may be arranged apart in the axial direction. Alternatively, the first fire-resistant member 20 and the second fire-resistant member 30 may be arranged partially overlapping in the axial direction.

[0077] (4) In each of the above embodiments, a configuration in which the second fire-resistant member 30 is fixed to only one side of the sleeve member 10 in the axial direction has been described as an example. However, the configuration is not limited to such a configuration, and the second fire-resistant member 30 may be fixed to both sides of the sleeve member 10 in the axial direction. Alternatively, the second fire-resistant member 30 may be fixed to the axial central part of the sleeve member 10.

[0078] (5) In the first to third embodiments described above, a configuration in which the fire protection unit 1 is equipped with a locking member 40 was described as an example. However, the fire protection unit 1 is not limited to such a configuration and does not need to be equipped with a locking member 40. In this case, the portion for axial positioning and fixing to the compartment 8 may be formed by cutting and bending a part of the sleeve member 10 (non-combustible sleeve 12).

[0079] (6) In each of the above embodiments, a configuration in which the fire protection unit 1 is equipped with a shielding member 50 was described as an example. However, the fire protection unit 1 is not limited to such a configuration and does not need to be equipped with a shielding member 50.

[0080] (7) In each of the above embodiments, a configuration in which the thermal expansion onset temperature of the first fire-resistant member 20 is lower than that of the second fire-resistant member 30 has been described as an example. However, the configuration is not limited to such an example, and the thermal expansion onset temperature of the first fire-resistant member 20 may be the same as that of the second fire-resistant member 30. Alternatively, the thermal expansion onset temperature of the second fire-resistant member 30 may be lower than that of the first fire-resistant member 20.

[0081] (8) In the first embodiment described above, the second fire-resistant member 30 is arranged to span both the inside and outside of the through-hole 8H, and in the second to fourth embodiments described above, the configuration in which the entire second fire-resistant member 30 is located on the outside of the through-hole 8H has been described as an example. However, the configuration is not limited to such an example, and the entire second fire-resistant member 30 may be located on the inside of the through-hole 8H.

[0082] (9) In each of the above embodiments, a configuration in which the entire shielding member 50 is positioned outside the through-hole 8H has been described as an example. However, the configuration is not limited to this, and a part or all of the shielding member 50 may be positioned inside the through-hole 8H.

[0083] (10) The configurations disclosed in each of the above-described embodiments (including the above-described embodiments and other embodiments; the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, insofar as they do not cause a conflict. With respect to other configurations, the embodiments disclosed herein are illustrative in all respects and can be modified as appropriate without departing from the spirit of the disclosure. [Explanation of symbols]

[0084] 1. Fire prevention unit 8 compartments 8H through hole 9 Long body 10 Sleeve component 20 First fire-resistant component 30 Second fire-resistant component 32 Support part 34 Projecting piece 38 Lingulae 40 Locking member 50 Shielding member 60 Retaining member G Gap

Claims

1. A fire protection unit for creating a fire-resistant structure in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, A sleeve member inserted through the aforementioned through hole, A first fire-resistant member, which includes a heat-expandable fire-resistant material, is fixed to the inner circumferential surface of the sleeve member. A second fire-resistant member, which includes a thermally expandable fire-resistant material, is fixed to the inner circumference of the sleeve member and is arranged to extend radially in the sleeve member. A fire protection unit equipped with fire prevention measures.

2. The fire protection unit according to claim 1, further comprising a shielding member positioned outside the longitudinal direction of the elongated body beyond the second fire-resistant member, and blocking the gap between the second fire-resistant member and the elongated body.

3. The fire protection unit according to claim 2, wherein the shielding member is fixed to the inner circumferential surface of the sleeve member.

4. The sleeve member further comprises a retaining member arranged on the outer circumference and fixed to the outer surface of the partition body, The fire protection unit according to claim 2, wherein the shielding member is fixed to the inner circumferential surface of the holding member.

5. The fire protection unit according to claim 1, wherein the thermal expansion onset temperature of the first fire-resistant member is lower than the thermal expansion onset temperature of the second fire-resistant member.

6. The fire protection unit according to claim 1, wherein the thermal expansion onset temperature of the second fire-resistant member is lower than the thermal expansion onset temperature of the first fire-resistant member.

7. The fire protection unit according to claim 1, wherein the thermal expansion initiation temperature of the first fire-resistant member is equal to the thermal expansion initiation temperature of the second fire-resistant member.

8. The fire protection unit according to claim 1, further comprising a locking member disposed on the outer circumferential surface of the sleeve member and locking to the outer surface of the partition body.

9. The fire protection unit according to claim 1, wherein the sleeve member is formed in a cylindrical shape by rolling up a non-combustible sheet material and overlapping its ends.

10. The fire protection unit according to any one of claims 1 to 9, wherein the second fire-resistant member comprises a sheet-like support portion arranged along the inner circumferential surface of the sleeve member and a plurality of sheet-like protruding pieces extending radially from the support portion.

11. The fire protection unit according to any one of claims 1 to 9, wherein the second fire-resistant member has a plurality of tongue-shaped pieces arranged such that their base portions are connected to each other along the inner circumferential surface of the sleeve member and their apex portions face each other radially.

12. A fire protection structure provided in the gap between a through-hole formed in a partition of a building and a long body inserted through the through-hole, A sleeve member inserted through the aforementioned through hole, A first fire-resistant member containing a heat-expandable fire-resistant material is arranged on the inner circumferential surface of the sleeve member, A second fire-resistant member containing a thermally expandable fire-resistant material is arranged on the inner circumference side of the sleeve member so as to extend in the radial direction of the sleeve member, A fire-resistant structure equipped with fire protection measures.

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